What is the recommended way to unit test suspending code in Kotlin/JS? I've been using <https://stac...

# javascript

[CLOVIS]

What is the recommended way to unit test suspending code in Kotlin/JS? I've been using https://stackoverflow.com/questions/47956444/how-to-unit-test-kotlin-js-code-with-coroutines for a while, but when there are many tests, some timeout. If I run tests by one, they never timeout, but if I run all of them, 2–3 tests timeout (different ones everytime). I'm starting to think returning a Promise means they all start at the same time, and some have to wait for the others to finish so there are enough threads?
What can I do to solve this?

[thana]

nothing changed since

[russhwolf]

The JS test runners have a global timeout that I think is 2 seconds by default. You can override for node by doing something like this in your gradle file

js {
        nodejs {
            testTask {
                useMocha {
                    timeout = "120s"
                }
            }
        }
    }

and you can override for browser by adding a directory named karma.config.d, and placing within it a .js file with contents like this

config.set({
  "client": {
    "mocha": {
      "timeout": 120000
    },
  },
  "browserDisconnectTimeout": 120000
});

[russhwolf]

There might be a way to do the browser one from gradle by now but there wasn't when I last dug into this stuff last spring

[andylamax]

Thanks @russhwolf, Been looking for this for a while now

[simon.vergauwen]

Is this still working?

[russhwolf]

As far as I know, yes. Stately uses it for stress tests.

[simon.vergauwen]

Thank you so much @russhwolf. I checked Stately, and found my karma.config.d directory was in the wrong folder 🤦